Jet augmenter or ejector



Mgg! 27 1924. l

P. A. BANCEL ET Al.

JET AUGMENTER on EJECTOR Filed Aug. 18,y 1922 THEM? ATT EA'Y Patented May 27,' 1924.

mais@ 'PATE-Nr -oFFlcE-L" PAUL A. BANCEL, 0F NUTLEY, AND JOHN F. XIRGAN, 0F PHILLIPSBURG, NEVIv JERSEY,

ASSIGNORSTO INGERSOLL-RAND COMPANY, 0F JERSEY CITY, NEW JERSEY, A COR PoRA'rIoN or' NEW'JERSEY.

JET AUGMENTER 0R EJEGTOR.

appncatmniniimigust 1a, i922. serial No. 532,743.

To all lwhom t mag/concern.

Be it known thatV we, PAUL A. BANCEL and JOHN F. KIRGAN, both citizens of the United States, and residents of Nutley, county of Essex, State of New Jersey, and

Phillipsburg, county of Warren, State of New Jersey, respectively, have invented a certain Jet Augmenter or Ejector, off'which the following isa specification, accompanied by drawings.

r This invention relates to jet augmenters or ejectors, more particularly for augmenting Huid pressure 1n any desired apparatus,

-such as a condenser, cooler or similar vessel,

by means of Huid jets, in which the fluids are separated into a. plurality of separate enveloping layers or strata, which later commingle. y

The primary object of the invention is to simplify and improve the construction of the augmenter or ejector and to cause the steam to be emitted from the nozzle in the form of a hollow cylindrical jet or envelope,d so that a large area is provided inside and outside of the jet or envelope of steam for the entrainment of the air and other vapors from the condenser.

Afurther object is to construct the ring nozzle and diuser of fewparts and of such shape that they effectively cooperate with each other to cause the steam to be 'emitted from the nozzle in the formA of a cylindrical jet or envelope surrounding an inner envelope of air and vapor, the steam jet being itself surrounded by an'outer envelope of air or vapor, and the inner envelope of air surroundin a core of cooling water which is forced t rough the center of the enveloping Huid strata.

Another object is to introduce'the cooling water at a point in the diffuser body, and in a manner, which is most effective for cooling purposes and to obtain a certain condensing ei'ect.

Further objects will later appear and to the ends set forth our invention consists in the features of construction and. operation described inthe following specification and illustrated in one'of its preferred forms in the accompanwing drawings, in which- Figure 1 is a top plan view of the ejector,

Referring to the drawings, the body por-` tion or diffuser A of the ejector is cast or otherwise constructed in-one piece, and as shown is formed with the contracted throat B having the enlarged outlet C at one' end of the body, \preferably surrounded by the securing. fiange D which may be' provided with securing a ertures and fastening means (not shown?, by means of which the ejector isl secured in position on the desired apparatus with which it is to be used. The inlet E of the ejector, for air or other Vvapor, or both, is preferably formed in a straight tubular portion F of the inlet head G which forms part of the body and extends at -an fangle to the longitudinal axis of the e'ector, in this instance the inlet E being s own at right angles lto said axis and provided with the securing flange H.

Av nozzle aperture J is provided at the end of the body portion adjacent to the inlet head G for the insertion of a nozzle body Kin. axial alignmentwith the throat B. It is important that the nozzle aperture J shall' be concentric with the throat of the diffuser for good o eration. The nozzle body K is provide withan externally screw threaded portion L `which isadapted to cooperate with a screw threaded portion O of the nozzle aperture J for removably connecting the nozzle body K to the inlet head G. An offset portion P is preferably formed on the outer .end of the nozzle body K toVV facilitate adjustment, and also to vprovidea connection between an inlet apertureV Q in the nozzle body and an exterior which may be steam, by'means of a pipe R The nozzle 4flange S is adapted to bear against the head G and form a tight `jointv and the meeting surfaces 4of the flange S and head G are preferably machined so as 'to be true with yeach other and the parts are preferably constructed and adjusted with the outlet of the nozzle in proper position relative to the throat B, although the nozzle body K may be adjusted longitudinally in different positions if required lby i-nsertin'g a spacer in the form of a washer or paelring material between the meeting surfaces of the flange S and the body A.

The nozzle body K 'is formed with an inner tubular extension T, an outer annular fiange U, and an annular chamber vV between the tubular extension T and 'iange U.

' beyond the end of the flange U and the outer cylindrical wa`ll of the extension T gradually decreases in diameter toward the outerl end beginning at a point W j ust below the end of the-.fiange An annular ring or cap X having a reduced diameter screw threaded portion Y is adapted to be threadedinto the flange U -which is provided with internal screw threads'Z for this purpose.

The ring X surrounds the end of the tubular extension T and the opening inv the ring X is of slightly greater diameter than the widest vportion W of. the tubular extension T, so that an annular or ring passage a is formed between the flange U and tubular extension T, this ring passage a gradually increasing in volume beginning at the point W. in one side of the nozzlebody K maintains communication between the chamber V' and the steam inlet Rf. ,The longitudinal cylindrical chamber. c formed in the tubular extension T concentrically with the ring passage' a; communicates with a transverse passage d in the nozzle body K and the passage d is open to communication with the inlet The nozzle body K is provided with two longitudinally aligned bores e and f con* centric with the chamber o and separated by an upper annular shoulder g. A lower annular shoulder 71. separates the bore e' from the chamber o. The shoulders g and i1, serve to support and guide an elongated cylindrical tube y' having a head 7c adapted to rest on the shoulder g and extending axially through the bore e, and chamber o beyond the end of the nozzle K and into the diiiuser body A terminating at a point.

approximately in alignment with the narrowest portion of the contracted throat B.- The longitudinal bore p of the tube y' is adapted to vconvey water or other liquid, supplied to the bore f froml an inlet pipe connection g, tothe interior of the di'user body A. The position of the tube j v-may be adjusted longitudinally by interposing a spacer between the head la and shoulder g.

Live steam'entering the nozzle through the steam connection 'R and passing through the communicating passage b into the annular chamber V and from thence to the ring 'passage a in the end of the nozzle, is adapted to flow into the throat B and through the diffuser in the form of an envelope as shown at s surrounding the air or vapor, or both, passing fromthe inlet E into and through the communicating passages d and `o, and out of the nozzle around the tube j, as indicated at 1'. This envelope of steam is itself surrounded by an outerenvelope of the same medium which Hows through the passages al and 0, the outer envelope being formed by the fluid from the inlet -E flowing around A longitudinal passage b located.

the sides of the nozzle within the inlet head G and downwardly past the end of the nozzle between the interior wall of the diffuser body and the envelope of steam as seen at t. The

`mixture flowing into the throat B thus conring. The several enveloping strata 1', s, t

decrease in volumeupon entering the throat portion B of the diffuser around the end of the tube y' and the pressure increases 'correspondingly, and approximately at this point a core or jet of cooling'water or other liquid w is projected through the center of the vaporous massf The mixture iiowing through the diEuser thus consists ofY a core of cooling liquid, an innerv surounding envelope ot' vapor or air, an enve ope of steam, 4and an outer envelope of vapor or air, the mixture being emitted from the enlarged outlet C with all its elements edectively commingled.

The construction of the ring nozzle permits the envelope of. steam to present a .large area for the entrainment of the air or other vapor, bothvin'side and outside of the steam envelope and the introduction of the cooling liquid at the throat B produces an appreciablel condensing effect, all of which tend to the most eii'ective utlization of .the principles of pressure augmentation and condensation which are desirable and necessary to obtain the best results with ejectors of the type for which the present invention is adapted.

What we claim ist,

1. A jet augmenter or ejector comprisin a body portion having an inlet, throat and outlet, a nozzle connected to said body portion and extending into said inlet, a passage in said nozzle communicating with said inlet mentioned fluids a fiuid different from either Aof the other fluids.

2. A jet augmenter or ejector comprising a body portion having an inlet, throat and outlet, a nozzle connected to saidbody portion and extending into said inlet, a passage in said nozzle communicating with said inlet through which air from' said inlet is adapted to be drawn, an annular passage in said nozzle surrounding said first mentioned passage adapted to projectinto said throat an tac envelope of steam, said steam envelope being adapted to be surrounded by an' envelope of air from said inlet and a second nozzle connected to said irst mentioned nozzle for supplying a liquid to the mixture of air and steam.

3. A jet augmenter or ejector comprising a body portion having an inlet, throat and outlet, a nozzle connected to seid body portion and extending into said inlet, a longitudinal passage in said nozzle communicating with said inlet through which air is adapted to be drawn from said inlet, an annular passage in said nozzle surrounding said first mentioned passage adapted to project into said throat an envelope of steam, seid steam e11- velope being adapted to be surrounded by un envelope of air from said inlet and a second nozzle connected to said first mentioned nozzle and extending into said throat Jfor supplying liquid to the mixture of air and steam.

In testimony whereof We have signed this specification. l

PAUL A. BANGEL. JOHN F. KIRGAN. 

